I think that Shakespeare make Juliet's parents seem like aggressive and overprotective people. But I do not think that he make them look like villains. If you think about it, Juliet's parents are only trying to protect her from the enemy, which are the Montagues like Romeo. If you had a daughter or son, you would want them to get married to a ally. In Act IV Scenes II-V the parents have basically tried everything they could to make sure Juliet would not marry Romeo. So I personally think that Juliet's parents are just trying to keep her safe.